GCF, LCM, and Re-Writing Expressions

Which of the following are factors of 12? (Select ALL)

• 7

• 6

• 4

• 3

Tags

CCSS.4.OA.B.4

Find the GCF of 15 and 18

(a)  

Find the GCF of 10 and 30

(a)  

What are the first four multiples of 6?

• 1,2,3,6

• 12,18,24,30

• 6,12,18,24

Find the LCM of 4 and 8

(a)  

Find the LCM of 12 and 9

(a)  

Which pair of numbers has a GCF of 9?

• 3 and 6

• 12 and 24

• 18 and 27

• 18 and 36

Which pair of numbers has an LCM of 15?

• 2 and 10

• 5 and 10

• 4 and 5

• 5 and 15

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 5 seconds. The other sign blinks every 4 seconds. In how many seconds will they blink together?

(a)  

Lisa is making baskets to donate to charity. She has 18 markers and 36 crayons. What is the greatest number of baskets she can make if each marker and crayon is distributed among the baskets?

(a)